Multi-component mathematical model of solid oxide fuel cell anode

Hussain, Mohammed; Li, X.; Dinçer, İbrahim

doi:10.1002/er.1141

Cited by 56 publications

(33 citation statements)

References 16 publications

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“…The energy efficiency, Z, was calculated according to Equation (29) by dividing the energies output produced from fuel cell with H 2 , CO, and CH 4 formed from the SRE as fuels, E out , by the total energy input of ethanol, E in , which is 1.37 Â 10 6 J mol À1 [25][26][27][28].…”

Section: Calculation Of Energy Efficienciesmentioning

confidence: 99%

Thermodynamic analysis of steam reforming of ethanol for hydrogen generation

Wang

2008

Int. J. Energy Res.

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SUMMARYThermodynamic equilibrium of ethanol steam reforming has been studied by Gibbs free energy minimization method for hydrogen production in the ranges of water-to-ethanol ratio from 0 to 20, reaction temperature from 400 to 2000 K, pressure from 1 to 60 atm, argon-to-ethanol ratio from 0 to 100. The optimal conditions suitable for the use in molten carbonate fuel cell and solid oxide fuel cell were obtained as follows: 900-1200 K, water-to-ethanol ratio of 3:6, and 1 atm. Under the optimal conditions, complete conversion of ethanol, 60.52-83.58% yield of hydrogen and 32.82-79.60% yield of carbon monoxide could be obtained and no coke forms. Higher pressures have a negative effect, but inert gases have a positive effect, on the hydrogen yield. Coke tends to form at lower temperatures and lower waterto-ethanol ratios.

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Section: Calculation Of Energy Efficienciesmentioning

confidence: 99%

Thermodynamic analysis of steam reforming of ethanol for hydrogen generation

Wang

2008

Int. J. Energy Res.

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“…The diffusion flux in the pore phase can be determined using the modified Stefan-Maxwell equations incorporating Knudsen diffusion for multi-component systems involving n species, expressed as [45]:…”

Section: Model Formulationmentioning

confidence: 99%

Modeling an ordered nanostructured cathode catalyst layer for proton exchange membrane fuel cells

Hussain

Song

Liu

et al. 2011

Journal of Power Sources

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Modeling an ordered nanostructured cathode catalyst layer for proton exchange membrane fuel cells Hussain, M.M.; Song, D.; Liu, Z.-S.; Xie, Z.This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. abstract A 3D mathematical model of an ordered nanostructured cathode catalyst layer (CCL) has been developed for proton exchange membrane (PEM) fuel cells. In an ordered nanostructured CCL, carbon nanotubes (CNTs) are used as support material for Pt catalyst, upon which a thin layer of proton-conducting polymer (Nafion) is deposited, which are then aligned along the main transport direction (perpendicular to the membrane) of various species. The model considers all the relevant processes in different phases of an ordered nanostructured CCL. In addition, the effect of Knudsen diffusion is accounted in the model. The model can predict not only the performance of an ordered nanostructured CCL at various operating and design conditions but also can predict the distributions of various fields in different phases of an ordered nanostructured CCL. The predicted nanostructured CCL performance with estimated membrane overpotential is validated with measured data found in the literature, and a good agreement is obtained between the model prediction and measured result. Moreover, a parametric study is conducted to investigate the effect of key design parameters on the performance of an ordered nanostructured CCL. In the absence of liquid water, it is found that oxygen diffusion in the pore phase is not the limiting factor for the performance of an ordered nanostructured CCL, owing to its parallel gas pores and high porosity. However, the transport of dissolved oxygen through the Nafion phase has a significant effect on the performance of an ordered nanostructured CCL. Further, it is found that increasing the spacing between CNTs results in a considerable drop in the performance of an ordered nanostructured CCL at the base case conditions considered in the simulation.

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“…The activation overpotential can be determined with the Butler-Volmer equation with good accuracy [29,30,39].…”

Section: Electrochemical Modelmentioning

confidence: 99%

Modeling of a planar solid oxide fuel cell based on proton-conducting electrolyte

Ni¹

2009

Int. J. Energy Res.

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SUMMARYA 2D computational fluid dynamics (CFD) model is developed to study the performance of an advanced planar solid oxide fuel cell based on proton conducting electrolyte (SOFC-H). The governing equations are solved with the finite volume method (FVM). Simulations are conducted to understand the transport phenomena and electrochemical reaction involved in SOFC-H operation as well as the effects of operating/structural parameters on SOFC-H performance. In an SOFC based on oxygen ion conducting electrolyte (SOFC-O), mass is transferred from the cathode side to the anode side. While in an SOFC-H, mass is transferred from the anode to the cathode, which causes different velocity fields of the fuel and oxidant gas channels and influences the distributions of temperature and gas composition in the cell. It is also found that increasing the inlet gas velocity leads to an increase in the local current density and a slight decrease in the SOFC-H temperature due to stronger cooling effect of the gas species at a higher velocity. Another finding is that the electrode structure does not significantly affect the heat and mass transfer in an SOFC-H at typical operating voltages.

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Multi-component mathematical model of solid oxide fuel cell anode

Cited by 56 publications

References 16 publications

Thermodynamic analysis of steam reforming of ethanol for hydrogen generation

Thermodynamic analysis of steam reforming of ethanol for hydrogen generation

Modeling an ordered nanostructured cathode catalyst layer for proton exchange membrane fuel cells

Modeling of a planar solid oxide fuel cell based on proton-conducting electrolyte

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